The Paramagnetic Curie Temperature of the Alloys Gd(Al_1-xCu_x)₂ and Gd(Al_1-xNi_x)₂

Abstract

The paramagnetic Curie temperature θ p is measured for the alloys Gd(Al 1- x Cu x ) 2 and Gd(Al 1- x Ni x ) 2 . The values of θ p plotted versus the number of conduction electrons n 0 are found on a single curve. The decrease of θ p with decreasing n 0 is in contradiction with the prediction made by Buschow et al. on the basis of the Ruderman-Kittel-Kasuya-Yosida theory. A reinterpretation of the result based on the same theory is given.